Step

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A step is a block which is placed into an activity diagram. When a step receives the required data, an activity is triggered, which performs the block assigned to the step. Please note that multiple activities can execute the same step. This happens when new data is coming in before the first activity is finished. If the parallelism is not limited, another activity will be triggered.

In workflow literature this term is used in the same tenor. In UML literature the terms "action", "activity" and "step" are unfortunately used inconsistently. The expecco documentation strictly separates between "block" (= action definition), "step" (= placed block) and "activity" (= executed step). Please note that a block can be placed several times as a step and steps can be instantiated by multiple activities.

See also: Block, Activity, Pin, Connection  

For other diagram elements see: Diagram Elements  

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